INameSpaceTreeControlEvents::OnBeforeExpand method (shobjidl.h)
Called before an IShellItem is expanded.
Syntax
HRESULT OnBeforeExpand(
[in] IShellItem *psi
);
Parameters
[in] psi
Type: IShellItem*
A pointer to the IShellItem that is to be expanded.
Return value
Type: HRESULT
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2008 [desktop apps only] |
| Target Platform | Windows |
| Header | shobjidl.h |